Values you can change in the E-mail options of the configuration menu
1.  E-mail Transport Method (Leave as sendmail)
2.  E-mail Linefeeds (Defines the character sequence used to separate mail headers)
3.  Use MIME HTML When Sending Emails (Change to true, if you wish to use html code when sending emails)
4.  Verify E-mail Address Through DNS
5.  Send E-Mails

How To Change A Value
1.  Click on the name of the field you wish to edit.  It will change colors letting you know its selected.
2.  Click on the "Edit" button on the right side (see Figure-1)
3.  Make your changes
4.  Click on the "Update" button to save your changes (see Figure-2)

Figure-1 Click to enlarge

Figure-2 Click to enlarge